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鋯對(duì)鑄造3104鋁合金微觀結(jié)構(gòu)和力學(xué)性能的影響
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青海大學(xué)

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本工作由中國(guó)鋁業(yè)股份有限公司青海分公司（橫向批準(zhǔn)號(hào)：K151879）和青海省自然科學(xué)基金（批準(zhǔn)號(hào)：2018-ZJ-957Q 和 2020-ZJ-933Q）資助。


Effect of Zr on microstructures and mechanical properties of as-cast Al- Mn-Fe 3104 alloy
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qinghai university

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This work was ?nanced by Aluminum Corporation of China Limited Qinghai Branch (Grant No. K151879), and the Natural Science Foundation of Qinghai Province under Grant No. 2018-ZJ-957Q and 2020-ZJ-933Q.

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    摘要:

    研究了不同鋯添加量的3104合金的析出組織和力學(xué)性能。結(jié)果表明，隨著Zr含量的增加，合金晶粒尺寸減小，當(dāng)Zr質(zhì)量分?jǐn)?shù)大于或等于0.25%時(shí)，合金晶粒最?。?0μm）。同時(shí)，晶粒形狀由羽毛狀變?yōu)榈容S狀。此外，Zr還可以通過(guò)形成Si相和其它金屬間化合物來(lái)改善合金中Si和Mn元素的分布。維氏硬度分析表明，Zr的加入會(huì)降低Al-Mn-Fe 3104合金的硬度。此外，根據(jù)拉伸試驗(yàn)結(jié)果，當(dāng)Zr質(zhì)量分?jǐn)?shù)不高于0.25%時(shí)，隨著Zr含量的增加，合金的拉伸強(qiáng)度和延伸率都有所提高。適當(dāng)?shù)腪r含量可以起到釘扎位錯(cuò)和阻礙滑移的作用，提高合金的強(qiáng)度和韌性。

    Abstract:

    The precipitation microstructure and mechanical properties of as-cast 3104 alloys with different Zr additions was investigated. The results showed that the grain size of alloy decreases with the increase of Zr content, and it has the smallest grain (20μm) when the mass fraction of Zr (Zr wt%) was greater than or equal to 0.25%. Meanwhile, the grain shape changes from feathery to equiaxed. Furthermore, Zr can improve the distribution of Si and Mn elements in the alloy by forming Si phase and other intermetallic compounds. Vickers hardness analysis showed that the addition of Zr will reduce the hardness of Al-Mn-Fe 3104 alloy. Moreover, according to the results of tensile test, tensile strength and the elongation of the cast alloy are increase with Zr content increase until Zr wt% was 0.25%. The proper content of Zr plays a role of pinning dislocation and preventing slip, which improves strength and toughness of the alloys.

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zhanglinhui.鋯對(duì)鑄造3104鋁合金微觀結(jié)構(gòu)和力學(xué)性能的影響[J].稀有金屬材料與工程,2021,50(3):769~774.[zhanglinhui. Effect of Zr on microstructures and mechanical properties of as-cast Al- Mn-Fe 3104 alloy[J]. Rare Metal Materials and Engineering,2021,50(3):769~774.]
DOI：10.12442/j. issn.1002-185X. E20200009

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  • 收稿日期:2020-03-10
  • 最后修改日期:2020-06-09
  • 錄用日期:2020-06-30
  • 在線發(fā)布日期: 2021-04-02
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